12071.4. (a) This section shall be known, and may be cited as, the
Gun Show Enforcement and Security Act of 2000.
(g) No person at a gun show or event, other than security
personnel or sworn peace officers, shall possess at the same time
both a firearm and ammunition that is designed to be fired in the
firearm. Vendors having those items at the show for sale or
exhibition are exempt from this prohibition...

(k) All persons possessing firearms at the gun show or event shall
have in his or her immediate possession, government-issued photo
identification, and display it upon request, to any security officer,
or any peace officer.
(l) Unless otherwise specified, a first violation of this section
is an infraction. Any second or subsequent violation is a
misdemeanor. Any person who commits an act which he or she knows to
be a violation of this section is guilty of a misdemeanor for a first
offense.

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False is the idea of utility that sacrifices a thousand real advantages for one imaginary or trifling inconvenience; that would take fire from men because it burns, and water because one may drown in it; that has no remedy for evils except destruction. The laws that forbid the carrying of arms are laws of such a nature. They disarm only those who are neither inclined nor determined to commit crimes.
-- Cesare Beccaria http://www.a-human-right.com/